3

See a Breast Surgeon:
At 40 a moveable lump is likely benign, but there is no way to know without an evaluation. A Breast Surgeon can examine you and perform an Ultrasound, a non-invasive imaging test to determine if it is a cyst or a solid mass. Then together you can decide whether it should be biopsied, removed, or simply observed.
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5

"Different":
Feeling for a lump in an organ that by it's very nature is lumpy-bumpy can be very confusing; usually, it's not a question of whether you can find a lump as much as how many. However, cancers often feel distinctly different than normal breast tissue: rock-hard (like it is made of concrete rather than rubber), 3-dimensionally round (rather than pancake- or cigar-shaped), and fixed w/in the breast.
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7

Possibilities...:
...Include a cyst, a tumor (benign or malignant), or fibrocystic changes. Any new breast lump must be evaluated by a physician to be certain that it's not a cancer. This certainty can be reached by physical examination, mammography, ultrasound, and/or biopsy, depending on many factors. If your doctor is certain that the lump is not cancerous, it does not need to be removed.
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8

Hard to Tell:
It is very difficult to distinguish a benign breast lump from a cancer by exam alone, for patient and doctor. In general, cancers tend to be rock-hard, 3-dimensionally round, and can feel "fixed" within the breast. Depending upon age and physical examination findings, we will often get a mammogram and ultrasound to help evaluate a breast lump, sometimes culminating in a (nonsurgical) biopsy.
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10

Benign or malignant:
If you feel a breast lump or mass you should get it taken care of. You should get a referral to a doctor who specializes in breast disease the best doctor would be a breast surgeon you need to have a history and exam and mammogram and or breast ultrasound and probably need a biopsy.
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